I was granted a B1/B2 visa with a single entry that will expire on September 2015. The annotation written on the visa is as follows:

WYA International Summer Camp
New York, NY
July 2015


I was supposed to go to that camp but there was a misunderstanding and have recently been informed that they wont be able to accommodate me anymore. On my interview, I told the consulate that aside from the camp, I will be visiting my relatives. Will I still be able to use my visa to go visit my relatives and tour around the US given that I wont be able to join the camp anymore?